diff options
| author | Xusheng <xusheng@vector35.com> | 2021-07-01 12:34:30 +0800 |
|---|---|---|
| committer | Xusheng Li <xushengli@protonmail.com> | 2021-07-05 10:11:47 +0800 |
| commit | 13ff200ba134b8704f37eca99c42b70dab0d17dc (patch) | |
| tree | 876b3db3c53f704b31152aeaede1f2edc9d27b24 /python/examples/kaitai/gzip.py | |
| parent | 4039a800349dcd587833d3e27d9137e4649818f4 (diff) | |
Remove snippet and kaitai plugin. Note their individual links.
Diffstat (limited to 'python/examples/kaitai/gzip.py')
| -rw-r--r-- | python/examples/kaitai/gzip.py | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/python/examples/kaitai/gzip.py b/python/examples/kaitai/gzip.py deleted file mode 100644 index 2f03aeec..00000000 --- a/python/examples/kaitai/gzip.py +++ /dev/null @@ -1,229 +0,0 @@ -# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild - -from pkg_resources import parse_version -from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO -from enum import Enum -import collections - - -if parse_version(ks_version) < parse_version('0.7'): - raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version)) - -class Gzip(KaitaiStruct): - """Gzip is a popular and standard single-file archiving format. It - essentially provides a container that stores original file name, - timestamp and a few other things (like optional comment), basic - CRCs, etc, and a file compressed by a chosen compression algorithm. - - As of 2019, there is actually only one working solution for - compression algorithms, so it's typically raw DEFLATE stream - (without zlib header) in all gzipped files. - - .. seealso:: - Source - https://tools.ietf.org/html/rfc1952 - """ - - class CompressionMethods(Enum): - deflate = 8 - - class Oses(Enum): - fat = 0 - amiga = 1 - vms = 2 - unix = 3 - vm_cms = 4 - atari_tos = 5 - hpfs = 6 - macintosh = 7 - z_system = 8 - cp_m = 9 - tops_20 = 10 - ntfs = 11 - qdos = 12 - acorn_riscos = 13 - unknown = 255 - SEQ_FIELDS = ["magic", "compression_method", "flags", "mod_time", "extra_flags", "os", "extras", "name", "comment", "header_crc16", "body", "body_crc32", "len_uncompressed"] - def __init__(self, _io, _parent=None, _root=None): - self._io = _io - self._parent = _parent - self._root = _root if _root else self - self._debug = collections.defaultdict(dict) - - def _read(self): - self._debug['magic']['start'] = self._io.pos() - self.magic = self._io.ensure_fixed_contents(b"\x1F\x8B") - self._debug['magic']['end'] = self._io.pos() - self._debug['compression_method']['start'] = self._io.pos() - self.compression_method = KaitaiStream.resolve_enum(self._root.CompressionMethods, self._io.read_u1()) - self._debug['compression_method']['end'] = self._io.pos() - self._debug['flags']['start'] = self._io.pos() - self.flags = self._root.Flags(self._io, self, self._root) - self.flags._read() - self._debug['flags']['end'] = self._io.pos() - self._debug['mod_time']['start'] = self._io.pos() - self.mod_time = self._io.read_u4le() - self._debug['mod_time']['end'] = self._io.pos() - self._debug['extra_flags']['start'] = self._io.pos() - _on = self.compression_method - if _on == self._root.CompressionMethods.deflate: - self.extra_flags = self._root.ExtraFlagsDeflate(self._io, self, self._root) - self.extra_flags._read() - self._debug['extra_flags']['end'] = self._io.pos() - self._debug['os']['start'] = self._io.pos() - self.os = KaitaiStream.resolve_enum(self._root.Oses, self._io.read_u1()) - self._debug['os']['end'] = self._io.pos() - if self.flags.has_extra: - self._debug['extras']['start'] = self._io.pos() - self.extras = self._root.Extras(self._io, self, self._root) - self.extras._read() - self._debug['extras']['end'] = self._io.pos() - - if self.flags.has_name: - self._debug['name']['start'] = self._io.pos() - self.name = self._io.read_bytes_term(0, False, True, True) - self._debug['name']['end'] = self._io.pos() - - if self.flags.has_comment: - self._debug['comment']['start'] = self._io.pos() - self.comment = self._io.read_bytes_term(0, False, True, True) - self._debug['comment']['end'] = self._io.pos() - - if self.flags.has_header_crc: - self._debug['header_crc16']['start'] = self._io.pos() - self.header_crc16 = self._io.read_u2le() - self._debug['header_crc16']['end'] = self._io.pos() - - self._debug['body']['start'] = self._io.pos() - self.body = self._io.read_bytes(((self._io.size() - self._io.pos()) - 8)) - self._debug['body']['end'] = self._io.pos() - self._debug['body_crc32']['start'] = self._io.pos() - self.body_crc32 = self._io.read_u4le() - self._debug['body_crc32']['end'] = self._io.pos() - self._debug['len_uncompressed']['start'] = self._io.pos() - self.len_uncompressed = self._io.read_u4le() - self._debug['len_uncompressed']['end'] = self._io.pos() - - class Flags(KaitaiStruct): - SEQ_FIELDS = ["reserved1", "has_comment", "has_name", "has_extra", "has_header_crc", "is_text"] - def __init__(self, _io, _parent=None, _root=None): - self._io = _io - self._parent = _parent - self._root = _root if _root else self - self._debug = collections.defaultdict(dict) - - def _read(self): - self._debug['reserved1']['start'] = self._io.pos() - self.reserved1 = self._io.read_bits_int(3) - self._debug['reserved1']['end'] = self._io.pos() - self._debug['has_comment']['start'] = self._io.pos() - self.has_comment = self._io.read_bits_int(1) != 0 - self._debug['has_comment']['end'] = self._io.pos() - self._debug['has_name']['start'] = self._io.pos() - self.has_name = self._io.read_bits_int(1) != 0 - self._debug['has_name']['end'] = self._io.pos() - self._debug['has_extra']['start'] = self._io.pos() - self.has_extra = self._io.read_bits_int(1) != 0 - self._debug['has_extra']['end'] = self._io.pos() - self._debug['has_header_crc']['start'] = self._io.pos() - self.has_header_crc = self._io.read_bits_int(1) != 0 - self._debug['has_header_crc']['end'] = self._io.pos() - self._debug['is_text']['start'] = self._io.pos() - self.is_text = self._io.read_bits_int(1) != 0 - self._debug['is_text']['end'] = self._io.pos() - - - class ExtraFlagsDeflate(KaitaiStruct): - - class CompressionStrengths(Enum): - best = 2 - fast = 4 - SEQ_FIELDS = ["compression_strength"] - def __init__(self, _io, _parent=None, _root=None): - self._io = _io - self._parent = _parent - self._root = _root if _root else self - self._debug = collections.defaultdict(dict) - - def _read(self): - self._debug['compression_strength']['start'] = self._io.pos() - self.compression_strength = KaitaiStream.resolve_enum(self._root.ExtraFlagsDeflate.CompressionStrengths, self._io.read_u1()) - self._debug['compression_strength']['end'] = self._io.pos() - - - class Subfields(KaitaiStruct): - """Container for many subfields, constrained by size of stream. - """ - SEQ_FIELDS = ["entries"] - def __init__(self, _io, _parent=None, _root=None): - self._io = _io - self._parent = _parent - self._root = _root if _root else self - self._debug = collections.defaultdict(dict) - - def _read(self): - self._debug['entries']['start'] = self._io.pos() - self.entries = [] - i = 0 - while not self._io.is_eof(): - if not 'arr' in self._debug['entries']: - self._debug['entries']['arr'] = [] - self._debug['entries']['arr'].append({'start': self._io.pos()}) - _t_entries = self._root.Subfield(self._io, self, self._root) - _t_entries._read() - self.entries.append(_t_entries) - self._debug['entries']['arr'][len(self.entries) - 1]['end'] = self._io.pos() - i += 1 - - self._debug['entries']['end'] = self._io.pos() - - - class Subfield(KaitaiStruct): - """Every subfield follows typical [TLV scheme](https://en.wikipedia.org/wiki/Type-length-value): - - * `id` serves role of "T"ype - * `len_data` serves role of "L"ength - * `data` serves role of "V"alue - - This way it's possible to for arbitrary parser to skip over - subfields it does not support. - """ - SEQ_FIELDS = ["id", "len_data", "data"] - def __init__(self, _io, _parent=None, _root=None): - self._io = _io - self._parent = _parent - self._root = _root if _root else self - self._debug = collections.defaultdict(dict) - - def _read(self): - self._debug['id']['start'] = self._io.pos() - self.id = self._io.read_u2le() - self._debug['id']['end'] = self._io.pos() - self._debug['len_data']['start'] = self._io.pos() - self.len_data = self._io.read_u2le() - self._debug['len_data']['end'] = self._io.pos() - self._debug['data']['start'] = self._io.pos() - self.data = self._io.read_bytes(self.len_data) - self._debug['data']['end'] = self._io.pos() - - - class Extras(KaitaiStruct): - SEQ_FIELDS = ["len_subfields", "subfields"] - def __init__(self, _io, _parent=None, _root=None): - self._io = _io - self._parent = _parent - self._root = _root if _root else self - self._debug = collections.defaultdict(dict) - - def _read(self): - self._debug['len_subfields']['start'] = self._io.pos() - self.len_subfields = self._io.read_u2le() - self._debug['len_subfields']['end'] = self._io.pos() - self._debug['subfields']['start'] = self._io.pos() - self._raw_subfields = self._io.read_bytes(self.len_subfields) - io = KaitaiStream(BytesIO(self._raw_subfields)) - self.subfields = self._root.Subfields(io, self, self._root) - self.subfields._read() - self._debug['subfields']['end'] = self._io.pos() - - - |
